# include<stdlib.h>
# include<stdio.h>
main()
{
struct student /*定义结构体类型 student及数且s[]*/
{
char number[6];
char name[20];
char sex;
int age;
int score;
} s[2]={{ "21531","李阳",'m',19,270.5},{"21532","宋美",'f',18,292} };
struct student ss[2]; /*定义结构体类型数组ss[],用以存放从文件中读出的数据*/
int i,j;
FILE * fp;
if((fp=fopen("e:\\stu.txt","wb+") ) == NULL)
{
printf("无法打开文件！\n");
exit(0);
}
j=sizeof(struct student);
for(i=0;i<=1;i++)
if(fwrite(&s[i],j,1,fp)!= 1)
printf("写入文件时出错！\n");
rewind(fp);
printf(“读出文件内容：\n”);
for(i=0;i<=1;i++ )
{
fread(&ss[i],j,1,fp);
printf("%s %s %c %d %d\n",ss[i].number,ss[i].name,ss[i].sex,ss[i].age,ss[i].score);
}
fclose(fp);
}